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JEE PHYSICS MCQ: CURRENT ELECTRICITY
1
Medium
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Understanding
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A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves:
View answer and explanation
Correct option: D
A condition of no current flow through the galvanometer
Option D is correct because the potentiometer's accuracy stems from the condition of no current flow through the galvanometer at the balance point.
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Statement-1: If a resistor is connected to a battery the current decreases when the temperature increases.
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is
Statement-2: For most of the resistors, resistance increases with increase in temperature. The reciprocal of resistance is Corresponding to the resistance , which is order of colour coding on carbon resistors? In a meter bridge, the gaps are closed by resistance 2 and 3 ohms. The value of shunt to be added to 3 ohm resistor to shift the balancing point by is